Await always waits

runtime/vm/object.cc

Index: runtime/vm/object.cc
===================================================================
--- runtime/vm/object.cc	(revision 41084)
+++ runtime/vm/object.cc	(working copy)
@@ -1457,6 +1457,8 @@
   CLASS_LIST_WITH_NULL(ADD_SET_FIELD)
 #undef ADD_SET_FIELD
 
+  object_store->InitAsyncObjects();
+
   return Error::null();
 }
 
@@ -5498,6 +5500,12 @@
     // Native methods don't need to be optimized.
     return false;
   }
+  if (is_async_closure()) {
+    // TODO(hausner|fschneider): A suspected bug in the load elimination
+    // optimizer causes some async closures to fail. Until that bug is
+    // fixed, do not optimize async closures.
+    return false;
+  }
   if (is_optimizable() && (script() != Script::null()) &&
       ((end_token_pos() - token_pos()) < FLAG_huge_method_cutoff_in_tokens)) {
     // Additional check needed for implicit getters.